Adjective: Solid information, proof, etc is based on facts and you are certain that it is correct.
-- This provides solid evidence that he committed the crime.
Adjective: Honest and able to be trusted
-- N/A
Adjective: Continuing for a period of time without stopping
-- The noise continued for two solid hours/two hours solid.
Güvenilir, gerçek, elle tutulur, kayda değer, inandırıcı
Sağlam karakterli, güvenilir, saygıdeğer
Aralıksız, süregelen